---
id: guide-0011
title: "What are the recommended oil-change intervals, and why do they matter?"
category: guide
subtopic: maintenance-oil
page_type: guide
source_url: "https://www.castlecadillacmchenry.com"
tags: ["maintenance", "oil change", "intervals", "engine care"]
questions:
  - "How often should I change my oil?"
  - "What's the right oil change interval?"
  - "Why are oil changes important?"
related: [first-service-visit, scheduling-service, maintenance-tires]
dealer: Castle Cadillac McHenry
---

Regular oil changes are the foundation of engine health. At Castle Cadillac McHenry, we follow manufacturer guidelines to keep your vehicle running strong.

**Oil-Change Intervals**

Modern Cadillacs typically require an oil change every 7,500 to 10,000 miles or 6 to 12 months, depending on your model and driving habits. Your owner's manual has your vehicle's exact interval. Synthetic oils often allow longer intervals than conventional; our service team will recommend the right oil for your Cadillac.

**Why They Matter**

Oil lubricates engine parts, reduces friction, and carries away heat and debris. Over time, oil breaks down and becomes less effective. Regular changes prevent sludge buildup, extend engine life, maintain fuel efficiency, and protect your warranty.

**Severe Driving**

If you tow, drive in extreme heat, or do frequent short trips, you may need oil changes more often. Our service team can advise based on your driving patterns.

**Stay on Track**

Call (779) 265-4427 to schedule your next oil change or ask any questions. We'll help you maintain your Cadillac's performance and longevity.